I was at a salvage yard the other day and noticed a smaller diameter gear box. Mine is the large one. If you know which is the difference please enlighten me on which is better. I need to change mine out soon and I plan on installing a filter inline. Not that that makes any difference. Just curious as to which one is better.
Am I being to vague?

Thanks Robert P.

 

Which ever one you get Should match output of the pump. The early style is full time and the later style are Slipper [part time].
A slipper type will leak early with a full time pump set up and a full time will chatter when used with the slipper type pump.
If your truck is 69 or later & OEM Stock, it should be the newer slipper type P/S sys.

FBp

 

All of the following information applies only to 2WD power steering setups.
The Bendix steering gearbox requires the full time non-slipper type pump. The Bendix gearbox can be identified with an aluminum top cover, held down by 4 bolts.
The fulltime pump is always a steel cannister type, with a dipstick in a narrow fill tube.
The Bendix box was used '65 - '69, possibly into early '70.

Note that the two types of gearboxes were used roughly '69 - '70, so you need to pay attention to which type you have.

The only other type of power steering gearbox used '69 - '79 was the Ford or Saginaw box.
It can be identified as having a steel top cover with only 2 bolts. Up to '76, it
it also used a cannister type pump, but with the slipper type internal mechanism. In other words, a cannister type pump CAN BE a slipper type which looks identical externally to the non-slipper type.
The later plastic wide-mouth pumps, and the flat pancake style pumps (looks sorta like GM pumps) are all slipper type. I have found that in most cases, a round plastic case pump bolts up in place of the round metal cannister one. You will need to get a pressure hose for it though, as the outlet fitting is different. As for a pump and a pressure hose for a '78 F-150 with a 351M, and you will get the correct application.

Hope this helps!

 

It did help. Thanks.
OK, now that I have new info, let me now get to the point.
71 crew f250 2wd.Whichsetup would be best - Pump and gear box. Don't forget about me running an inline filter.

Thanks.

 

Stay with the Saginaw. Theye are durable and more plentiful and therefore cheaper to service and replace. The Bendix power steering box is weak, and susceptible to blowing out before 100K miles.

 

I concur completely with my friend Banjopicker. . .The saginaw style System is the only choice in my opinion. It has modernity going for it. It also provides road feel.

FBp